LG Electronics 42LT760H-ZA 5. AV Video Trouble Shooting guide

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5. AV Video Trouble Shooting guide
Check input signal format.
Is it supported?
Check the input of MTK(IC105).
Measure waveform at C616 because it’s more easy to check.
Can you see the normal waveform?
Check JK4600
Can you see the normal
waveform?
Check AC cable for damage
For damage or open conductor.
This board has big problem because Main chip (MTK) have some troubles.
After checking thoroughly all path once again, You should decide to replace MTK or not.
Replace JK4600.
N
Y
Y
Y
Y